Penn State starting linebacker Michael Mauti will miss the rest of the season after suffering a torn ACL in his left knee during Saturday's game against Eastern Michigan, the school announced Sunday.
Mauti, a redshirt junior, was the Nittany Lions' leading tackler going into the Eastern Michigan game with 20 stops.
He also missed the 2009 season after tearing his right ACL in August.
Mauti had a career-high 13 tackles in a loss to Alabama earlier this season and grabbed a key interception that led to the winning touchdown against Temple on Sept. 17.
Penn State also announced that cornerback D'Anton Lynn, who was carted off the field on a backboard and taken to a local hospital during Saturday's game, was released from the hospital later that day.
Lynn had full use of his extremities, and his hospitalization was seen as a precautionary measure.
His status for this week's Big Ten opener against Indiana is uncertain.
Brian Bennett covers Big Ten football for ESPN.com